6403216515 has 64 divisors (see below), whose sum is σ = 10997752320. Its totient is φ = 3170027520.

The previous prime is 6403216513. The next prime is 6403216541. The reversal of 6403216515 is 5156123046.

It is not a de Polignac number, because 6403216515 - 2¹ = 6403216513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6403216513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9030981 + ... + 9031689.

It is an arithmetic number, because the mean of its divisors is an integer number (171839880).

Almost surely, 2^6403216515 is an apocalyptic number.

6403216515 is a deficient number, since it is larger than the sum of its proper divisors (4594535805).

6403216515 is a wasteful number, since it uses less digits than its factorization.

6403216515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 6403216515 is about 80020.1006935133. The cubic root of 6403216515 is about 1856.9465176050.

The spelling of 6403216515 in words is "six billion, four hundred three million, two hundred sixteen thousand, five hundred fifteen".